CN106979373A - The low impact hydraulic control system and its control method of a kind of big orifice hydraulic gate valve - Google Patents
The low impact hydraulic control system and its control method of a kind of big orifice hydraulic gate valve Download PDFInfo
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- CN106979373A CN106979373A CN201710341313.7A CN201710341313A CN106979373A CN 106979373 A CN106979373 A CN 106979373A CN 201710341313 A CN201710341313 A CN 201710341313A CN 106979373 A CN106979373 A CN 106979373A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 210000000664 rectum Anatomy 0.000 claims abstract description 29
- 230000005611 electricity Effects 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 79
- 230000015572 biosynthetic process Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/008—Reduction of noise or vibration
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to the low impact hydraulic control system and its control method of a kind of big orifice hydraulic gate valve, the system includes slide valve, also include hydraulic jack and valve block, piston rod is provided with hydraulic jack, the inside of hydraulic jack is divided into rod chamber room and rodless cavity room by piston rod, valve block is provided with the first control valve group and the second control valve group, first control valve group includes the first electro-hydraulic reversing valve, second control valve group includes the second solenoid directional control valve, first electro-hydraulic reversing valve communicates with rod chamber room and forms the first left oil circuit, first electro-hydraulic reversing valve communicates with rodless cavity room and forms the first right oil circuit, second solenoid directional control valve communicates with rod chamber room and forms the second left oil circuit, second solenoid directional control valve communicates with rodless cavity room and forms the second right oil circuit.This programme under conditions of the quick opening and closing of valve are met, efficiently solves the problem of slide valve impacts big when starting and in place by using the cooperation of the control valve group of two groups of different latus rectums.
Description
Technical field
The invention belongs to Ferrous Metallurgy equipment technical field, and in particular to a kind of low impact liquid of big orifice hydraulic gate valve
Pressure control system and its control method.
Background technology
Blast funnace hot blast stove is one of main supporting equipment of Iron Works, and general seat height stove matches somebody with somebody 3~4 hot-blast stoves,
The effect of hot-blast stove is for the continual high-temperature hot-air for providing more than 1000 degree of blast furnace.
Slide valve is small because of its fluid resistance, and torque needed for opening and closing is small, and physique structure is simple, makes in blast-furnace hot-air furnace system
Ratio is wide.In big volume blast-furnace hot-air furnace system, because institute's required airflow is big, the comparison that the slide valve of big orifice is used
It is many, such as hot-blast valve, cold blast sliding valve, chimney valve etc., latus rectum can reach 1800mm.
According to the requirement of hot-blast stove production technology, the time that these big orifice valves are typically opened and closed is 16~20S,
The speed of valve operation is fast, and it is that (nominal outside diameter is DN16 by latus rectum to be one group using most hydraulic control circuits at present
The superposition valve group that electro-hydraulic reversing valve, hydraulic lock and Double throttle check valve 16mm) is constituted.The speed opened and closed due to valve
It is all very fast, when valve starts and when opening or closing latched position in place, high pressure can be produced in hydraulic circuit, the chain of valve and
Valve body can all produce larger impact, all unfavorable to hydraulic system and equipment.The more feasible solution used at present is done
Method is that the switch adoption rate valve of the hydraulic gate valve of big orifice is controlled, and proportioning valve is reduced when starting and closing in place
Control signal, so as to reduce the impact of hydraulic system and equipment, but not only cost is higher for the control loop of adoption rate valve,
And the cleanliness of hydraulic oil grade needed for hydraulic work system can be improved, increase the cost of production maintenance.
The content of the invention
In view of this, it is an object of the invention to provide a kind of low impact hydraulic control system of big orifice hydraulic gate valve
And its control method, the control system and its control method can effectively reduce big orifice hydraulic gate valve rushing operationally
Hit, protection hydraulic system and apparatus body, and do not improve the cleannes grade of hydraulic work system.
To reach above-mentioned purpose, the present invention provides following technical scheme：
A kind of low impact hydraulic control system of big orifice hydraulic gate valve, including slide valve, in addition to hydraulic jack and
Piston rod is provided with valve block, hydraulic jack, the inside of hydraulic jack is divided into rod chamber room and rodless cavity room, piston rod by piston rod
It is connected with the valve of slide valve, valve block is provided with the first control valve group and the second control valve group, the first control valve group includes first
Electro-hydraulic reversing valve, the second control valve group includes the second solenoid directional control valve that latus rectum is less than the first electro-hydraulic reversing valve, and first electro-hydraulic changes
Connected to the pressure oil path and way to cycle oil of valve and the second solenoid directional control valve in valve block, the first electro-hydraulic reversing valve and rod chamber
Room communicates and forms the first left oil circuit, and the first electro-hydraulic reversing valve communicates with rodless cavity room and forms the first right oil circuit, the second electromagnetism
Reversal valve communicates with rod chamber room and forms the second left oil circuit, and the second solenoid directional control valve communicates with rodless cavity room and forms second right side
Oil circuit.
It is preferred that, the latus rectum of each element is each element in DN16, second control valve group in first control valve group
Latus rectum be DN6.
It is preferred that, first control valve group also includes the first hydraulic lock, and second control valve group also includes the second liquid
Pressure lock.First hydraulic lock and the second hydraulic lock are used to pin each oil circuit when not working, and prevent flowing of the fluid in oil circuit,
The job stability of hydraulic jack is ensure that, and then ensure that the valve opening of slide valve and the stability of closed position, it is to avoid
The maloperation of slide valve valve.
It is preferred that, first control valve group also includes the first left Double throttle check valve and the first right Double throttle check valve,
First left Double throttle check valve is connected in the first left oil circuit, and the first right Double throttle check valve is connected in the first right oil circuit, the
One left Double throttle check valve includes the first left check valve and the first left choke valve being connected in parallel, the first right Double throttle check valve bag
The right check valve of first be connected in parallel and the first right choke valve are included, second control valve group also includes second left double one-way throttles
Valve and the second right Double throttle check valve, the second left Double throttle check valve are connected in the second left oil circuit, second right double one-way throttles
Valve is connected in the second right oil circuit, and the second left Double throttle check valve includes the second left check valve and the second left throttling being connected in parallel
Valve, the second right Double throttle check valve includes the second right check valve and the second right choke valve being connected in parallel.First left check valve,
One right check valve, the second left check valve and the second right check valve are used for the one-way flow for controlling fluid in each oil circuit, the first left section
Stream valve, the first right choke valve, the second left choke valve and the second right choke valve are used to control flow during each oil circuit oil return, produce simultaneously
Back pressure is given birth to ensure the stability for doing work to hydraulic jack.
It is preferred that, the first proximity switch is provided with the valve-opening position of slide valve, in the valve-closed position of slide valve
Provided with the second proximity switch.When the valve opening of slide valve is at the first proximity switch, the first proximity switch sends control letter
Number control the second solenoid directional control valve power-off, it is ensured that the accuracy of the valve-opening position of slide valve, when the valve of slide valve
When closing at the second proximity switch, the second proximity switch sends the power-off that control signal controls the second solenoid directional control valve, it is ensured that
The accuracy of the valve-closed position of slide valve.
It is preferred that, the check valve with Opening pressure is provided with way to cycle oil.By being provided with tool on way to cycle oil
There is the check valve of Opening pressure, it is ensured that be full of fluid in each oil circuit all the time.
A kind of low its control method of impact hydraulic pressure of big orifice hydraulic gate valve, including open method and method for closing, are opened
The method of opening comprises the following steps：
(1), it is powered to the second solenoid directional control valve so that the second left oil circuit that the second solenoid directional control valve is communicated with rod chamber room
It is in into oil condition, the second right oil circuit that the second solenoid directional control valve is communicated with rodless cavity room is in oil return state, now rod chamber
Indoor piston rod carries out retraction acting, and piston rod drives the valve of slide valve slowly to open；
(2), it is powered to the first electro-hydraulic reversing valve so that the first left oil circuit that the first electro-hydraulic reversing valve is communicated with rod chamber room
It is in into oil condition, the first right oil circuit that the first electro-hydraulic reversing valve is communicated with rodless cavity room is in oil return state, now rod chamber
Indoor piston rod, which proceeds to retract, to do work and steadily accelerates, and piston rod drives the valve of slide valve to accelerate to open；
(3), in the valve opening of slide valve, preceding 3-4s causes the first electro-hydraulic reversing valve dead electricity, the first electro-hydraulic commutation in place
Valve is closed and stops doing work to piston rod, and piston rod continues retract acting and fortune of slowing down in the presence of the second solenoid directional control valve
OK, piston rod drives the valve of slide valve to slow down and opened；
(4), when the valve opening of slide valve is to the first proximity switch position, the first proximity switch sends control letter
Number so that the second solenoid directional control valve powers off and stops doing work to piston rod, and now the valve opening of slide valve is in place and valve
The position of door is locked；
Method for closing comprises the following steps：
(1), it is powered to the second solenoid directional control valve so that the second left oil circuit that the second solenoid directional control valve is communicated with rod chamber room
In oil return state, the second right oil circuit that the second solenoid directional control valve is communicated with rodless cavity room is in into oil condition, now rod chamber
Indoor piston rod carries out stretching acting, and piston rod drives the valve slowly closing of slide valve；
(2), it is powered to the first electro-hydraulic reversing valve so that the first left oil circuit that the first electro-hydraulic reversing valve is communicated with rod chamber room
In oil return state, the first right oil circuit that the first electro-hydraulic reversing valve is communicated with rodless cavity room is in into oil condition, now rod chamber
Indoor piston rod, which proceeds to stretch out, to do work and steadily accelerates, and piston rod drives the valve of slide valve to accelerate to close；
(3), close preceding 3-4s in place in the valve of slide valve and cause the first electro-hydraulic reversing valve dead electricity, the first electro-hydraulic commutation
Valve is closed and stops doing work to piston rod, and piston rod continues to stretch out acting and fortune of slowing down in the presence of the second solenoid directional control valve
OK, piston rod drives the valve of slide valve to slow down and closed；
(4), when the valve opening of slide valve is to the second proximity switch position, the second proximity switch sends control letter
Number so that the second solenoid directional control valve is powered off and stops doing work to piston rod, and now the valve of slide valve is closed in place and valve
The position of door is locked.
The beneficial effects of the present invention are：
1st, opening and closing of the present invention by using two sets of control valve groups to slide valve valve are controlled, wherein second
The latus rectum of each element of control valve group is less than the latus rectum of each element of the first control valve group, when opening and closing the valve of slide valve,
Less second control valve group of latus rectum is first set to be powered so that the valve of slide valve is initially in slowly in the startup of opening and closing
The state of motion, is then powered to the first control valve group so that the valve of slide valve accelerates to open and close, when the valve of slide valve
When door is soon opened and closed in place, first cause the first control valve group dead electricity, the valve of slide valve, which slows down, to be opened and closed, then
Again so that the second control valve group dead electricity, the valve of slide valve is slowly moved until being turned on and off in place.Therefore the present invention is in lock
Controlled when the valve opening of plate valve and the starting state closed and in place state using less second control valve group of latus rectum
System, thus solves the problem of slide valve impacts big when starting and in place, while this programme is in valve opening and the mistake closed
Cheng Zhong, the quick opening and closing of valve can be realized using the first larger control valve group of latus rectum, therefore this programme is by using two
The cooperation of the control valve group of the different latus rectums of group efficiently solves slide valve and existed under conditions of the quick opening and closing of valve are met
Start and in place when the problem of impact big.
2nd, the latus rectum of each element of the first control valve group used in the present invention is for DN16, and each element of the second control valve group leads to
Footpath is DN6, two groups be all regular size control valve components, control cost is low, while also without improving hydraulic work system
The cleannes grade of required pressure oil, reduces the cost of production maintenance.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carried out
Explanation：
Fig. 1 is the schematic diagram of the low impact hydraulic control system of big orifice hydraulic gate valve of the present invention.
Mark in Figure of description is as follows：Valve block 1, the first control valve group 2, the first electro-hydraulic reversing valve 21, the first hydraulic pressure
Lock the 22, first left Double throttle check valve 23, the first right Double throttle check valve 24, the second control valve group 3, the first solenoid directional control valve
31st, the second hydraulic lock 32, the second left Double throttle check valve 33, the second right Double throttle check valve 34, check valve 4, hydraulic jack 5,
Piston rod 51, rod chamber room 52, rodless cavity room 53, slide valve 6, the first proximity switch 61, the second proximity switch 62, pressure oil lead to
Road 7, way to cycle oil 8, the first left ball valve 9, the second right ball valve 10.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figure 1, the low impact hydraulic control system of a kind of big orifice hydraulic gate valve, including valve block 1, in valve block
First control valve group 2 and the second control valve group 3 be installed, the first control valve group 2 includes first and electro-hydraulic changed successively from top to bottom on 1
To valve 21, the first hydraulic lock 22, the first right Double throttle check valve 24 of left Double throttle check valve 23 and first, first in the present embodiment
Electro-hydraulic reversing valve 21, the first hydraulic lock 22, the first right Double throttle check valve 24 of left Double throttle check valve 23 and first latus rectum it is equal
For DN16, certainly, each element in the first control valve group 2 nor affects on the realization of this programme from other latus rectums, and first is left
Double throttle check valve 23 includes the first left check valve and the first left choke valve being connected in parallel, and the first right Double throttle check valve 24 is wrapped
The right check valve of first be connected in parallel and the first right choke valve are included, the second control valve group 3 includes the second electromagnetism successively from top to bottom
In reversal valve 31, the second hydraulic lock 32, the second right Double throttle check valve 34 of left Double throttle check valve 33 and second, the present embodiment
Two solenoid directional control valves 31, the second hydraulic lock 32, the latus rectum of the second right Double throttle check valve 34 of left Double throttle check valve 33 and second
It is DN6, certainly, each element in the second control valve group 3 nor affects on the realization of this programme from other latus rectums, it is only necessary to
The latus rectum of each element is less than the latus rectum of each element in the first control valve group 2 in second control valve group 3.Second left Double throttle check valve
33 the second left check valves and the second left choke valve including being connected in parallel, the second right Double throttle check valve 34 includes what is be connected in parallel
Second right check valve and the second right choke valve.The solenoid directional control valve 31 of pressure oil path 7 and second of first electro-hydraulic reversing valve 21
Pressure oil path 7 is connected in valve block 1, is communicated after connection with outside pressure oil-source, and the oil return of the first electro-hydraulic reversing valve 21 is led to
Road 8 is connected with the way to cycle oil 8 of the second solenoid directional control valve 31 in valve block 1, is communicated after connection with outside oil return box, in oil return
The check valve with Opening pressure is additionally provided with path 8, by being provided with unidirectional with Opening pressure on way to cycle oil 8
Valve, it is ensured that be full of fluid in each oil circuit all the time.
Hydraulic jack 5 is additionally provided with the upside of valve block 1, the right side of hydraulic jack 5 is provided with slide valve 6, on the right side of slide valve 6
Side further respectively has the first proximity switch 61 and the second proximity switch 62 from top to bottom, wherein the first proximity switch 61 is corresponding is
The position of the valve opening of slide valve 6, the position of the corresponding valve closing for being slide valve 6 of the second proximity switch 62, in hydraulic pressure
Piston rod 51 is provided with oil cylinder 5, piston rod 51 is connected by fixed pulley with slide valve 6, piston rod 51 is by the inside of hydraulic jack 5
It is divided into upper rod chamber room 52 and the rodless cavity room 53 under.
First control valve group 2 draws two outlets in the upside of valve plate, and two outlets are respectively from left to right that first left side goes out
Mouthful and the first right outlet, the second control valve group 3 draws two outlets in the upside of valve plate, two outlets from left to right respectively the
Two left outlets and the second right outlet, wherein the first left exit is connected with the first left ball valve 9, the left position of the first electro-hydraulic reversing valve 21
Passage, the first hydraulic lock 22, the first left Double throttle check valve 23, first it is left outlet and the first left ball valve 9 communicate after again with hydraulic pressure
The rod chamber room 52 of oil cylinder 5 communicates and forms the first left oil circuit, and the first right exit is provided with the first right ball valve, the first electro-hydraulic commutation
After the right bit port of valve 21, the first hydraulic lock 22, the first right Double throttle check valve 24, the first right outlet and the first right ball valve are communicated
Communicated again with the rodless cavity room 53 of hydraulic jack 5 and form the first right oil circuit, the second left exit is connected with the second left ball valve, the
The left bit port of two solenoid directional control valves 31, the second hydraulic lock 32, the second left Double throttle check valve 33, the second left outlet and second are left
Ball valve communicates with the rod chamber room 52 of hydraulic jack 5 and forms the second left oil circuit again after communicating, and the second right exit is connected with
Two right ball valves 10, the right bit port of the second solenoid directional control valve 31, the second hydraulic lock 32, the second right Double throttle check valve 34, second
Right outlet and the second right ball valve 10 communicate with the rodless cavity room 53 of hydraulic jack 5 and form the second right oil circuit again after communicating.
A kind of low impact hydraulic control method of big orifice hydraulic gate valve of the present invention, including open method and closing side
Method, wherein open method comprise the following steps：
(1) the electromagnet b on the right side of the second solenoid directional control valve 31, is made to be powered, now pressure oil is from the second solenoid directional control valve 31
Left bit port successively through the second hydraulic lock 32, the second left check valve, the second left outlet, the second left ball valve formation the second left oil
Entered behind road in the rod chamber room 52 of hydraulic jack 5 and retraction acting is carried out to piston rod 51, while the rodless cavity of hydraulic jack 5
Pressure oil in room 53 is successively through the second right ball valve 10, the second right outlet, the second right choke valve, the second hydraulic lock 32 and the second electricity
Oil return box is back to after second right oil circuit of the right bit port formation of magnetic reversal valve 31, due to the latus rectum of the second solenoid directional control valve 31
It is smaller, so when slide valve 6 valve slowly upwardly open, realize slide valve 6 open when low impacting start；
(2) the electromagnet b on the right side of the first electro-hydraulic reversing valve 21, is made to be powered, now pressure oil is from the first electro-hydraulic reversing valve 21
Left bit port successively through the first hydraulic lock 22, the first left check valve, the first left outlet, the first left ball valve 9 formation it is first left
Entered after oil circuit in the rod chamber room 52 of hydraulic jack 5 and retraction acting carried out to piston rod 51, at the same hydraulic jack 5 without bar
Pressure oil in chamber 53 is successively through the first right ball valve, the first right outlet, the first right choke valve, the first hydraulic lock 22 and the first electricity
Magnetic reversal valve right bit port formation the first right oil circuit after be back to oil return box, due to the first electro-hydraulic reversing valve 21 latus rectum compared with
Greatly, so when slide valve 6 the steady Accelerating running upwards of valve, realize the quick unlatching of slide valve 6；
(3), in valve opening preceding 3-4s in place of slide valve 6 (time of dead electricity is relevant with the switching time of valve in advance)
So that the electromagnet b dead electricity on the right side of the first electro-hydraulic reversing valve 21, the first electro-hydraulic reversing valve 21 is closed, the first left oil circuit and first right side
Oil circuit stops doing work to the piston rod 51 in hydraulic jack 5, and now the valve of slide valve 6 is slowed down；
(4), when the valve opening of slide valve 6 is to the first 61 position of proximity switch, the first proximity switch 61 is sent
Control signal so that the electromagnet b power-off of the right-hand member of the second solenoid directional control valve 31, the second left oil circuit and the second right oil circuit stop to work
Stopper rod 51 is done work, and now the valve location of slide valve 6 is locked, low when realizing the unlatching of the valve of slide valve 6 in place
Impact.
Method for closing comprises the following steps：
(1) the electromagnet a in the left side of the second solenoid directional control valve 31, is made to be powered, now pressure oil is from the second solenoid directional control valve 31
Right bit port successively through the second hydraulic lock 32, the second right check valve, the second right outlet, the second right ball valve 10 formation it is second right
Entered after oil circuit in the rodless cavity room 53 of hydraulic jack 5 and stretching acting is carried out to piston rod 51, while hydraulic jack 5 has bar
Pressure oil in chamber 52 is successively through the second left ball valve, the second left outlet, the second left choke valve, the second hydraulic lock 32 and the second electricity
Oil return box is back to after second left oil circuit of the left bit port formation of magnetic reversal valve 31, due to the latus rectum of the second solenoid directional control valve 31
It is smaller, so when slide valve 6 valve slowly close downwards, realize slide valve 6 close when low impacting start；
(2) the electromagnet a in the left side of the first electro-hydraulic reversing valve 21, is made to be powered, now pressure oil is from the first electro-hydraulic reversing valve 21
Right bit port successively through the first hydraulic lock 22, the first right check valve, the first right outlet, the first right ball valve formation the first right oil
Entered behind road in the rodless cavity room 53 of hydraulic jack 5 and stretching acting is carried out to piston rod 51, while the rod chamber of hydraulic jack 5
Pressure oil in room 52 is successively through the first left ball valve 9, the first left outlet, the first left choke valve, the first hydraulic lock 22 and the first electricity
Magnetic reversal valve left bit port formation the first left oil circuit after be back to oil return box, due to the first electro-hydraulic reversing valve 21 latus rectum compared with
Greatly, so when slide valve 6 the steady Accelerating running downwards of valve, realize the quick closedown of slide valve 6；
(3), close 3-4s preceding in place in the valve of slide valve 6 (time of dead electricity is relevant with the switching time of valve in advance)
So that the electromagnet a dead electricity in the left side of the first electro-hydraulic reversing valve 21, the first electro-hydraulic reversing valve 21 is closed, the first left oil circuit and first right side
Oil circuit stops doing work to the piston rod 51 in hydraulic jack 5, and now the valve of slide valve 6 carries out deceleration closing；
(4), when the valve of slide valve 6 is closed to the second 62 position of proximity switch, the second proximity switch 62 is sent
Control signal so that the electromagnet a power-off of the left end of the second solenoid directional control valve 31, the second left oil circuit and the second right oil circuit stop to work
Stopper rod 51 is done work, and now the valve location of slide valve 6 is locked, and is thus achieved the valve of slide valve 6 and is closed when in place
Low impact.
The present invention is less using latus rectum in valve opening and the starting state closed and the state in place of slide valve 6
Second control valve group 3 is controlled, and the problem of slide valve 6 impacts big when starting and in place is thus solved, while this programme
During valve opening and closing, quick unlatching and the pass of valve can be realized using the first larger control valve group 2 of latus rectum
Close, therefore this programme is meeting the condition that valve is quickly opened and closed by using the cooperation of the control valve group of two groups of different latus rectums
Under, efficiently solve the problem of slide valve 6 impacts big when starting and in place.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (7)
1. a kind of low impact hydraulic control system of big orifice hydraulic gate valve, including slide valve, it is characterised in that：Also include liquid
Piston rod is provided with compressing cylinder and valve block, hydraulic jack, the inside of hydraulic jack is divided into rod chamber room and rodless cavity by piston rod
The valve connection of room, piston rod and slide valve, valve block is provided with the first control valve group and the second control valve group, the first control valve group
Including the first electro-hydraulic reversing valve, the second control valve group includes the second solenoid directional control valve that latus rectum is less than the first electro-hydraulic reversing valve, the
The pressure oil path and way to cycle oil of one electro-hydraulic reversing valve and the second solenoid directional control valve are connected in valve block, the first electro-hydraulic reversing valve
Communicated with rod chamber room and form the first left oil circuit, the first electro-hydraulic reversing valve communicates with rodless cavity room and forms the first right oil circuit,
Second solenoid directional control valve is communicated with rod chamber room and forms the second left oil circuit, and the second solenoid directional control valve is communicated and shape with rodless cavity room
Into the second right oil circuit.
2. the low impact hydraulic control system of big orifice hydraulic gate valve according to claim 1, it is characterised in that：It is described
The latus rectum of each element is that the latus rectum of each element in DN16, second control valve group is DN6 in first control valve group.
3. the low impact hydraulic control system of big orifice hydraulic gate valve according to claim 2, it is characterised in that：It is described
First control valve group also includes the first hydraulic lock, and second control valve group also includes the second hydraulic lock.
4. according to the low impact hydraulic control system of any described big orifice hydraulic gate valve of claims 1 to 3, its feature exists
In：First control valve group also includes the first left Double throttle check valve and the first right Double throttle check valve, and first is left double unidirectional
Choke valve is connected in the first left oil circuit, and the first right Double throttle check valve is connected in the first right oil circuit, first left double unidirectional sections
Stream valve includes the first left check valve and the first left choke valve being connected in parallel, and the first right Double throttle check valve includes what is be connected in parallel
First right check valve and the first right choke valve, second control valve group also include the second left Double throttle check valve and second right pair
One-way throttle valve, the second left Double throttle check valve is connected in the second left oil circuit, and the second right Double throttle check valve is connected on second
In right oil circuit, the second left Double throttle check valve includes the second left check valve and the second left choke valve being connected in parallel, and second is right double
One-way throttle valve includes the second right check valve and the second right choke valve being connected in parallel.
5. a kind of low impact hydraulic control system of big orifice hydraulic gate valve according to claim 4, it is characterised in that：
The first proximity switch is provided with the valve-opening position of slide valve, approaches and opens provided with second in the valve-closed position of slide valve
Close.
6. a kind of low impact hydraulic control system of big orifice hydraulic gate valve according to claim 5, it is characterised in that：
The check valve with Opening pressure is provided with way to cycle oil.
7. a kind of low its control method of impact hydraulic pressure of big orifice hydraulic gate valve, it is characterised in that：Including open method and pass
Method is closed, open method comprises the following steps：
(1), it is powered to the second solenoid directional control valve so that the second left oil circuit that the second solenoid directional control valve is communicated with rod chamber room is in
Enter oil condition, the second right oil circuit that the second solenoid directional control valve is communicated with rodless cavity room is in oil return state, now in rod chamber room
Piston rod carry out retraction acting, piston rod drive slide valve valve slowly open；
(2), it is powered to the first electro-hydraulic reversing valve so that the first left oil circuit that the first electro-hydraulic reversing valve is communicated with rod chamber room is in
Enter oil condition, the first right oil circuit that the first electro-hydraulic reversing valve is communicated with rodless cavity room is in oil return state, now in rod chamber room
Piston rod proceed retract do work and steadily accelerate, piston rod drive slide valve valve accelerate open；
(3), in the valve opening of slide valve, preceding 3-4s causes the first electro-hydraulic reversing valve dead electricity in place, and the first electro-hydraulic reversing valve is closed
Close and stop doing work to piston rod, piston rod continues to retract in the presence of the second solenoid directional control valve to do work and run slowly, living
Stopper rod drives the valve of slide valve to slow down and opened；
(4), when the valve opening of slide valve is to the first proximity switch position, the first proximity switch sends control signal,
So that the second solenoid directional control valve powers off and stops doing work to piston rod, now the valve opening of slide valve is in place and valve
Position is locked；
Method for closing comprises the following steps：
(1), it is powered to the second solenoid directional control valve so that the second left oil circuit that the second solenoid directional control valve is communicated with rod chamber room is in
Oil return state, the second right oil circuit that the second solenoid directional control valve is communicated with rodless cavity room is in into oil condition, now in rod chamber room
Piston rod carry out stretching acting, piston rod drive slide valve valve slowly closing；
(2), it is powered to the first electro-hydraulic reversing valve so that the first left oil circuit that the first electro-hydraulic reversing valve is communicated with rod chamber room is in
Oil return state, the first right oil circuit that the first electro-hydraulic reversing valve is communicated with rodless cavity room is in into oil condition, now in rod chamber room
Piston rod proceed stretch out do work and steadily accelerate, piston rod drive slide valve valve accelerate close；
(3), close preceding 3-4s in place in the valve of slide valve and cause the first electro-hydraulic reversing valve dead electricity, the first electro-hydraulic reversing valve is closed
Close and stop doing work to piston rod, piston rod continues to stretch out in the presence of the second solenoid directional control valve to do work and run slowly, living
Stopper rod drives the valve of slide valve to slow down and closed；
(4), when the valve opening of slide valve is to the second proximity switch position, the second proximity switch sends control signal,
So that the second solenoid directional control valve powers off and stops doing work to piston rod, now the valve of slide valve is closed in place and valve
Position is locked.
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| CN201710341313.7A CN106979373A (en) | 2017-05-15 | 2017-05-15 | The low impact hydraulic control system and its control method of a kind of big orifice hydraulic gate valve |
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| CN201710341313.7A CN106979373A (en) | 2017-05-15 | 2017-05-15 | The low impact hydraulic control system and its control method of a kind of big orifice hydraulic gate valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110030222A (en) * | 2019-05-16 | 2019-07-19 | 中冶赛迪工程技术股份有限公司 | Its hydraulic system of a kind of differential hydraulic control loop of fluid control valve and application |
| CN110067780A (en) * | 2019-04-08 | 2019-07-30 | 宣化钢铁集团有限责任公司 | A kind of blocking dregs of converter furnace sliding plate hydraulic control device |
| CN112815106A (en) * | 2019-11-18 | 2021-05-18 | 上海梅山钢铁股份有限公司 | High-pressure descaling injection valve and pneumatic control method |
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